ALL of the points here have merit. First and foremost any new trek series better have an army of the BEST writers available, because as we have seen with late TNG, DS9, Voyager, and ENT. They have pretty much exhausted every "new" idea they could come up with, and started re-telling the same old redundant, and boring stories over, and over again.
To the point to where we seen "excessive over usage of time travel as a major plot device", "Space Nazis" in some way shape, or form (i think almost every series but DS9 had them unless you count the Dominion as space nazis). "The ultimate new technology that went horribly wrong", and an equally horribly written solution to the problem, "How the ultimate trek villains, The Borg went from "HOLY SHIT!!" in Best of Both Worlds to nothing more than retarded jack in the box's in Voyager", The inevitable god awful "filler" episodes with some of the most retarded story's (if you can call them that) ever told in sci fi. Then the movies ALWAYS (cept for the shatner centric ST:V) went over the top with the "Ultimate Evil heading straight for earth to destroy it". THAT is what killed old school trek. Running out of ideas, and horrible writing.
I grew up on classic TOS, but I liked TNG, because for up until Gene Roddenbury died it kept the "tradition" of trek, but it told some damn good, and fresh story's with no technobabble to save the day. I also liked DS9 because it did show the Federation had a "dark side", and in fact we were still "human" despite living in a future paradise. I loved quarks commentary in the siege of AR3yada yada "If you take away their creature comforts then they become as savage, and bloodthirsty as any Klingon". If they keep those traits in any new show it may be worth watching.
I am not liking the idea of a "younger" cast. A bunch of early 20 year olds galloping around the cosmos playing 90210 in space, or "Legend of the Rangers" makes me cringe. Mix up the age brackets. The Captain Him, or herself shouldnt be any younger than late 30's, or early 40's (as real life navy ship captains arent younger than 40's). Kirk was an exception, not the rule. Character driven i can go for as long as they dont turn it into a soap opera.
Would love to see more of the federations "founding races" on the bridge like the Andorians, and the Tellerites. Along with Vulcans. Perhaps we will see the first "Romulan" Starfleet bridge crew member. It would be interesting to see how the "logical" Vulcans, and the "fiercely Passionate" Romulans interact together in situations on board a starship.
The "filler" episodes could be from an "aliens" point of view, or about a situation that happens elsewhere on an alien world, but has a connection to this new ship, and crew in a future episode.
Make sure the new ship is NOT named Enterprise.